mcintosh



Jan. l, 1935.

- R. D. MCINTOSH SPRAYING APPARATUS FOR LIQUIDS saggi/ska Filed Dec. 17, 1931 Patented Jan. 1, 1935V PATyi-:Nr OFFICE "smarrisci4 APrARATUs Fon LIQJIDS Robert D. MeIn'toslLRiver Forest, Ill., assignor to The ImperialBrass `ManufacturingCompany, Chicago, Ill., a corporation of Illinois l Application December 17, l1931, seria1`N0.'581,692

4 Claims. (01.12994-89) My invention is concerned with spraying apparatus for liquids, and is designed `primarily to produce a device of the class described bywhich a stream of 'liquid only may be` delivered, orby 5 which liquid commingled with compressed air to produce av mist ofthe liquid may be delivered.

It is further concerned with suchk an apparatus provided with .a pressurev regulator so that the force with which the liquid is delivered may be regulated. l, l It is finally concerned` with certain novel combinations of elements and details of construction, as will be hereinafter fully described and particularly pointed out in the claims.

sheet of drawings in whichthesame Areference `characters are used to designate identical-parts in all the figures, of which, H Y

Fig. l is a side elevation of an apparatus containing my invention,`with a portion of the tank broken away and in section; l

Fig. 2 is a top plan view of the same with the hose detached; and l Fig. 3 is a vertical section,'on ank enlargedscale,

` in the bottom` ofthe member 16 and extending on the line 3-3 of Fig. 2. y 1

`The apparatus which I have illustrated as embodying-the preferred form of vmy inventionyis designed primarily` to distribute any desired liquid, which is placed in thebody `of,` the receptacle 10, the top 11, of course,:having been removed by loosening the set screws 12 of -the clamps 13 co-operating withthe abutments 14 provided on the periphery of the coverfor that purpose. The customary gasket 15,will be provided between the top of the receptacle and the cover.

Screwed into the top of the center ofthe cover, in the manner clearly shown in Fig. 3, is

the member 16, which has threaded in vone side` ward through an aperture in theclosure 21,`

50 which also has the apertures 26-therethrough, so that the compressed air from the pipe 18 will lift the diaphragm 27 having its edges secured between the top of the member 16 and the shoulder 28 formed on the interior of the cap casing 29 screwed thereon, as will be clearly seen in To illustrate my invention, I annex hereto a Fig. ,3. `A helically-coiled expanding spring V30 inthe recess 20 co-,operates with the valve 24 to hold the same closed when the pressure within the chamber directly beneath the diaphragm 27 is high enough.,I When the pressure becomes too low, the helically-coiled expanding -spring 31 in the cap member 29 co-operating with the disk 32 secured in `the center of thetdiaphragm l27 depresses thediaphragmagainst the valve stem 25, openinghthe valve and allowing a fresh supply of the higher compressed air to enter the chamber containing the air under `reduced pressure. The apparatus just described is a customary form of reducing valve, but I haveimproved the same in that I add to the screw 32', threaded in tcthe top of the cap `member 29 and serving to regulate the tension of the spring 31, and consequently thelpressure of the reduced air, the handle Y33 by which the receptacle may be conveniently transported.

`The air under l the reduced pressure passes through the bore 34, seen in dotted lines in Fig. 3,. leading fromthe bottom of the chamber 35 beneath the diaphragm 27 into the tube 36 secured down to the bottom of the receptacle 10. `As

there might beV a tendency for the air pressure to force the liquid back up through the tube 36` into the bore 34, I prevent this possibility by formingl in the tube36 one or more apertures 37. andI place in the tube 36, just above these aper-` tures `37, `the nipple 38, seen in dotted Vlines in Fig. 3, andthe result is that the compressed air passing down through the tube 36, escaping from this nipple 38, prevents the possibility of any liquid being carried upward past the same.

The liquid in the receptacle 10 is delivered by the air pressure on top of it upward through the tube 39, which extends from the bottom of the receptacle and is secured in the bottom of the member 16, which has the bore 40 (seen mainly in dotted lines in Fig. 3) which opens into the edge of the bottom of the threaded recess 41 formed in the opposite side of the member 16 from the cock 17. This recess 41 has screwed into it the connection 42, which is of an inverted T-shape and has the passage 43 therethrough, the outer end of which passage is internally threaded, as seen at 44, to receive the threaded portion 45 of the needle valve 46, its outer end being closed by the packing gland 47, and the valve 46 has secured on its outer end the handle 48 by which it is manipulated. The vertical arm 49` of the T-shaped connection 42 has the connecting nipple 50, seen in Fig. 1, threaded thereinto and connected by the hose 51 with the spraying nozzle 52, which is controlled by the hand-operated valve 53 in the customary manner. A bore 54 through the member 16 opens into the center of the bottom of the threaded recess 41, and this opening forms the Valve seat for the needle valve 46.

The operation of the apparatus willnow be apparent. If a solid stream ofthe liquid is to be discharged from the nozzle 52, the needle valve 46 is closed, and the liquid is forced by the air pressure in the receptacle lv up through the tube 39, the bore 40 and the passage 43, out

through the hose 51, and to the nozzle :52. Thev force of the liquid thus delivered canlee regulated by adjusting the handle 33 to regulate Vthe pres-. sure of the air in the receptacle. If it `is desired to deliver the liquid 'in the 'form of a mist, the needle valve 46 is opened and the compressed air rushing through the bore 54 and engaging the liquid in the passage 43 will vmix with it so that it is delivered -in `the form of a mist -from the nozzlev 52. The amount of the air thus vmixed with the liquid and the consequent neness of the mist can be controlled by the extent to which the needle valve 46 is opened.

v I preferably add to the member 16 a pressure gage 55 connected by the pipe 56 to the chamber 35, so that the operating pressure can be noted, and also a bleeder valve 57 likewise opening yinto the chamber 35, so that the pressure can be reduced to atmospheric, when desired.

While Ihave shown and described my invention as embodiedin the form which I at present consider best adapted to carryout its purposes,

i prior art.

What I claim as new, and 'desire tosecure vby Letters Patent of the United States, is:V K

1. In a device of the class described, Athe combination with a container, of a 'member adapted 1 to be secured in one side of the container, and

containing means for passing compressed air therethrough to the interior Aof `the container, an outlet pipe from the bottom of the container into the member, an internally-threaded recess in the side of ysaid member kdirectly opposite to the compressed air inlet, a compressed-air outletv through said member terminating ina valve seat at the center of the bottom of the recess, an outlet from the pipe through the member opening into the bottom of the recess, a connection screwed into the recess having an outlet in one side thereof, and a needle valve threaded into the connection and co-operating with the valve seat, for the purpose described.

2. In a spraying apparatus, the combination with a receptacle containing a liquid Vand closed by ahead, of means for supplying air under pressure to the surface of said liquid, a pipe leading from the bottom of the receptacle to a discharge outlet, an air Apassage leading to said outlet from the upper part of vthe receptacle, an outlet member adapted to be secured in the head of the receptacle :and connected to the aforesaid discharge :outlet having a needle valve extending therethrough and co-operating with a valve seat in said head which terminates said air passage, a liquid vpassage in the head opening around said valve seat, and an outlet from the side of the member through Which'the 'liquid may be delivered unmixed with air when said valve is closed, or vmixed with any ydesired quantity of air de'- pending on how much vthe valve is opened.

3. In a device ofthe class described, the combination with a container, of a head, consisting of a lower part adapted' to Vbe vscrewed'into the container and cup shape in the outer part, and an upper part screwedonto lthe top of the lower part, a diaphragm clamped between the two parts forming part of a pressure regulating valve, Athe Valve-member of which-is located in the top ofthe lower 4partand co-operates with a valve seat in said lower part, a spring in the upper part cooperating with `and-engaging the diaphragm to regulate the pressure, a regulating screw threaded through" the upper part land engaging the spring, an inlet passage leading to the under side of the -valve seat, a lpassage from the cup tothe container, an outlet terminating in a needlevalve seat, an outlet angle screwed into said outlet, a -needle valve threaded through said angle and engaging the seat, a pipe opening into the bottom of the head, a passage 'through said head from the pipe to the outer side ofv the valve seat, and an air passage through the `head Vfrom the bottom to thel inner -si'de of the needle Valve seat.

4. A device of the class described vconstructed as described in claim 3, inwhich the regulating screw has a handle on its outer end by which the container may be carried.

RGBERT D. MCINTOSI-I. 

